BS EN ISO 10634-1996 水质.水介质生物降解能力的连续测定用难溶于水的有机化合物的处理和制备导则

标准号：BS EN ISO 10634-1996
中文标准名称：水质.水介质生物降解能力的连续测定用难溶于水的有机化合物的处理和制备导则
英文标准名称：Water quality. Guidance for the preparation and treatment of poorly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium
标准类型：Z16
发布日期：1996/1/15 12:00:00
实施日期：1996/1/15 12:00:00
中国标准分类号：Z16
国际标准分类号：13.060.70
适用范围：This International Standard describes four techniques for preparing poorly water-soluble organic compounds and introducing them into test vessels for a sub-sequent test on biodegradability in an aqueous me-dium using standard methods. The test compounds concerned are not sufficiently soluble in water to perform the biodegradability tests in the normal man-ner, as described in the respective test methods indi-cated in clause 2. The preparation techniques are as follows: — direct addition (clause 3): this technique is re-stricted to non-volatile test compounds if inert supports or solvents are used; — ultrasonic dispersion (clause 4): this technique may be applied to non-volatile liquid and solid compounds; — adsorption on an inert support (clause 5); — dispersions or emulsions with an emulsifying agent (clause 6). The subsequent tests on biodegradability are primarily methods using the analysis of the released carbon dioxide (see ISO 9439) and the determination of the oxygen consumption (see ISO 9408). This Inter-national Standard does not describe the test methods; it is restricted to describing the techniques for intro-ducing the test substances into the test medium and to keep them in a dispersed state. These techniques are implemented while observing the experimental conditions described in the standardized methods for evaluating biodegradability. It should be noted that volatile chemicals may not be tested by the carbon dioxide method specified in ISO 9439.